diff --git a/packages/apidom-ls/src/config/codes.ts b/packages/apidom-ls/src/config/codes.ts
index 22ab89a387..7f6d20a3a4 100644
--- a/packages/apidom-ls/src/config/codes.ts
+++ b/packages/apidom-ls/src/config/codes.ts
@@ -748,6 +748,22 @@ enum ApilintCodes {
   OPENAPI3_0_OAUTH_FLOWS_FIELD_CLIENT_CREDENTIALS_TYPE = 5210300,
   OPENAPI3_0_OAUTH_FLOWS_FIELD_AUTHORIZATION_CODE_TYPE = 5210400,
 
+  OPENAPI3_0_OAUTH_FLOW = 5220000,
+  OPENAPI3_0_OAUTH_FLOW_FIELD_AUTHORIZATION_URL_FORMAT_URI = 5220100,
+  OPENAPI3_0_OAUTH_FLOW_FIELD_AUTHORIZATION_URL_REQUIRED,
+  OPENAPI3_0_OAUTH_FLOW_FIELD_TOKEN_URL_FORMAT_URI = 5220200,
+  OPENAPI3_0_OAUTH_FLOW_FIELD_TOKEN_URL_REQUIRED,
+  OPENAPI3_0_OAUTH_FLOW_FIELD_REFRESH_URL_FORMAT_URI = 5220300,
+  OPENAPI3_0_OAUTH_FLOW_FIELD_SCOPES_TYPE = 5220400,
+  OPENAPI3_0_OAUTH_FLOW_FIELD_SCOPES_REQUIRED,
+
+  OPENAPI3_0_XML = 5230000,
+  OPENAPI3_0_XML_FIELD_NAME_TYPE = 5230100,
+  OPENAPI3_0_XML_FIELD_NAMESPACE_FORMAT_URI = 5230200,
+  OPENAPI3_0_XML_FIELD_PREFIX_TYPE = 5230300,
+  OPENAPI3_0_XML_FIELD_ATTRIBUTE_TYPE = 5230400,
+  OPENAPI3_0_XML_FIELD_WRAPPED_TYPE = 5230500,
+
   OPENAPI3_1 = 7000000,
 
   OPENAPI3_1_OPENAPI_VALUE_PATTERN_3_1_0 = 7000100,
diff --git a/packages/apidom-ls/src/config/openapi/oauth-flow/completion.ts b/packages/apidom-ls/src/config/openapi/oauth-flow/completion.ts
new file mode 100644
index 0000000000..823c2fb2ad
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/oauth-flow/completion.ts
@@ -0,0 +1,79 @@
+import {
+  ApidomCompletionItem,
+  CompletionFormat,
+  CompletionType,
+} from '../../../apidom-language-types';
+
+const completion: ApidomCompletionItem[] = [
+  {
+    label: 'authorizationUrl',
+    insertText: 'authorizationUrl',
+    kind: 14,
+    format: CompletionFormat.QUOTED,
+    type: CompletionType.PROPERTY,
+    insertTextFormat: 2,
+    documentation: {
+      kind: 'markdown',
+      value:
+        '**REQUIRED**. The authorization URL to be used for this flow. This MUST be in the form of a URL.',
+    },
+    targetSpecs: [
+      { namespace: 'openapi', version: '3.0.0' },
+      { namespace: 'openapi', version: '3.0.1' },
+      { namespace: 'openapi', version: '3.0.2' },
+      { namespace: 'openapi', version: '3.0.3' },
+    ],
+  },
+  {
+    label: 'tokenUrl',
+    insertText: 'tokenUrl',
+    kind: 14,
+    format: CompletionFormat.QUOTED,
+    type: CompletionType.PROPERTY,
+    insertTextFormat: 2,
+    documentation: {
+      kind: 'markdown',
+      value:
+        '**REQUIRED**. The token URL to be used for this flow. This MUST be in the form of a URL.',
+    },
+    targetSpecs: [
+      { namespace: 'openapi', version: '3.0.0' },
+      { namespace: 'openapi', version: '3.0.1' },
+      { namespace: 'openapi', version: '3.0.2' },
+      { namespace: 'openapi', version: '3.0.3' },
+    ],
+  },
+  {
+    label: 'refreshUrl',
+    insertText: 'refreshUrl ',
+    kind: 14,
+    format: CompletionFormat.QUOTED,
+    type: CompletionType.PROPERTY,
+    insertTextFormat: 2,
+    documentation: {
+      kind: 'markdown',
+      value: 'The URL to be used for obtaining refresh tokens. This MUST be in the form of a URL.',
+    },
+    targetSpecs: [
+      { namespace: 'openapi', version: '3.0.0' },
+      { namespace: 'openapi', version: '3.0.1' },
+      { namespace: 'openapi', version: '3.0.2' },
+      { namespace: 'openapi', version: '3.0.3' },
+    ],
+  },
+  {
+    label: 'scopes',
+    insertText: 'scopes ',
+    kind: 14,
+    format: CompletionFormat.OBJECT,
+    type: CompletionType.PROPERTY,
+    insertTextFormat: 2,
+    documentation: {
+      kind: 'markdown',
+      value:
+        '**REQUIRED**. The available scopes for the OAuth2 security scheme. A map between the scope name and a short description for it. The map MAY be empty.',
+    },
+  },
+];
+
+export default completion;
diff --git a/packages/apidom-ls/src/config/openapi/oauth-flow/documentation.ts b/packages/apidom-ls/src/config/openapi/oauth-flow/documentation.ts
index 493e3c7730..bffa7a3891 100644
--- a/packages/apidom-ls/src/config/openapi/oauth-flow/documentation.ts
+++ b/packages/apidom-ls/src/config/openapi/oauth-flow/documentation.ts
@@ -1,14 +1,44 @@
 const documentation = [
+  {
+    target: 'authorizationUrl',
+    docs: 'Applies to `oauth2` (`"implicit"`, `"authorizationCode"`). **REQUIRED**. The authorization URL to be used for this flow. This MUST be in the form of a URL.',
+    targetSpecs: [
+      { namespace: 'openapi', version: '3.0.0' },
+      { namespace: 'openapi', version: '3.0.1' },
+      { namespace: 'openapi', version: '3.0.2' },
+      { namespace: 'openapi', version: '3.0.3' },
+    ],
+  },
   {
     target: 'authorizationUrl',
     docs: 'Applies to `oauth2` (`"implicit"`, `"authorizationCode"`). **REQUIRED**. The authorization URL to be used for this flow. This MUST be in the form of a URL. The OAuth2 standard requires the use of TLS.',
     targetSpecs: [{ namespace: 'openapi', version: '3.1.0' }],
   },
+  {
+    target: 'tokenUrl',
+    docs: 'Applies to `oauth2` (`"password"`, `"clientCredentials"`, `"authorizationCode"`). **REQUIRED**. The token URL to be used for this flow. This MUST be in the form of a URL.',
+    targetSpecs: [
+      { namespace: 'openapi', version: '3.0.0' },
+      { namespace: 'openapi', version: '3.0.1' },
+      { namespace: 'openapi', version: '3.0.2' },
+      { namespace: 'openapi', version: '3.0.3' },
+    ],
+  },
   {
     target: 'tokenUrl',
     docs: 'Applies to `oauth2` (`"password"`, `"clientCredentials"`, `"authorizationCode"`). **REQUIRED**. The token URL to be used for this flow. This MUST be in the form of a URL. The OAuth2 standard requires the use of TLS.',
     targetSpecs: [{ namespace: 'openapi', version: '3.1.0' }],
   },
+  {
+    target: 'refreshUrl',
+    docs: 'Applies to `oauth2`. The URL to be used for obtaining refresh tokens. This MUST be in the form of a URL.',
+    targetSpecs: [
+      { namespace: 'openapi', version: '3.0.0' },
+      { namespace: 'openapi', version: '3.0.1' },
+      { namespace: 'openapi', version: '3.0.2' },
+      { namespace: 'openapi', version: '3.0.3' },
+    ],
+  },
   {
     target: 'refreshUrl',
     docs: 'Applies to `oauth2`. The URL to be used for obtaining refresh tokens. This MUST be in the form of a URL. The OAuth2 standard requires the use of TLS.',
@@ -18,6 +48,15 @@ const documentation = [
     target: 'scopes',
     docs: 'Map[`string`, `string`]\n\\\n\\\nApplies to `oauth2`. **REQUIRED**. The available scopes for the OAuth2 security scheme. A map between the scope name and a short description for it. The map MAY be empty.',
   },
+  {
+    docs: '#### [OAuth Flow Object](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.0.3.md#oauth-flow-object)\n\nConfiguration details for a supported OAuth Flow\n\n##### Fixed Fields\nField Name | Type | Applies To | Description\n---|:---:|---|---\nauthorizationUrl | `string` | `oauth2` (`"implicit"`, `"authorizationCode"`) | **REQUIRED**. The authorization URL to be used for this flow. This MUST be in the form of a URL.\ntokenUrl | `string` | `oauth2` (`"password"`, `"clientCredentials"`, `"authorizationCode"`) | **REQUIRED**. The token URL to be used for this flow. This MUST be in the form of a URL.\nrefreshUrl | `string` | `oauth2` | The URL to be used for obtaining refresh tokens. This MUST be in the form of a URL.\nscopes | Map[`string`, `string`] | `oauth2` | **REQUIRED**. The available scopes for the OAuth2 security scheme. A map between the scope name and a short description for it. The map MAY be empty.\n\nThis object MAY be extended with [Specification Extensions](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.0.3.md#specificationExtensions).\n\n##### OAuth Flow Object Examples\n\n```JSON\n{\n  "type": "oauth2",\n  "flows": {\n    "implicit": {\n      "authorizationUrl": "https://example.com/api/oauth/dialog",\n      "scopes": {\n        "write:pets": "modify pets in your account",\n        "read:pets": "read your pets"\n      }\n    },\n    "authorizationCode": {\n      "authorizationUrl": "https://example.com/api/oauth/dialog",\n      "tokenUrl": "https://example.com/api/oauth/token",\n      "scopes": {\n        "write:pets": "modify pets in your account",\n        "read:pets": "read your pets"\n      }\n    }\n  }\n}\n```\n\n\n\\\nYAML\n```yaml\ntype: oauth2\nflows:\n  implicit:\n    authorizationUrl: https://example.com/api/oauth/dialog\n    scopes:\n      write:pets: modify pets in your account\n      read:pets: read your pets\n  authorizationCode:\n    authorizationUrl: https://example.com/api/oauth/dialog\n    tokenUrl: https://example.com/api/oauth/token\n    scopes:\n      write:pets: modify pets in your account\n      read:pets: read your pets\n```',
+    targetSpecs: [
+      { namespace: 'openapi', version: '3.0.0' },
+      { namespace: 'openapi', version: '3.0.1' },
+      { namespace: 'openapi', version: '3.0.2' },
+      { namespace: 'openapi', version: '3.0.3' },
+    ],
+  },
   {
     docs: '#### [OAuth Flow Object](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#oauthFlowObject)\n\nConfiguration details for a supported OAuth Flow\n##### Fixed Fields\nField Name | Type | Applies To | Description\n---|:---:|---|:---\nauthorizationUrl | `string` | `oauth2` (`"implicit"`, `"authorizationCode"`) | **REQUIRED**. The authorization URL to be used for this flow. This MUST be in the form of a URL. The OAuth2 standard requires the use of TLS.\ntokenUrl | `string` | `oauth2` (`"password"`, `"clientCredentials"`, `"authorizationCode"`) | **REQUIRED**. The token URL to be used for this flow. This MUST be in the form of a URL. The OAuth2 standard requires the use of TLS.\nrefreshUrl | `string` | `oauth2` | The URL to be used for obtaining refresh tokens. This MUST be in the form of a URL. The OAuth2 standard requires the use of TLS.\nscopes | Map[`string`, `string`] | `oauth2` | **REQUIRED**. The available scopes for the OAuth2 security scheme. A map between the scope name and a short description for it. The map MAY be empty.\n\n\\\nThis object MAY be extended with [Specification Extensions](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#specificationExtensions).\n##### OAuth Flow Object Examples\n\n\\\nJSON\n```json\n{\n  "type": "oauth2",\n  "flows": {\n    "implicit": {\n      "authorizationUrl": "https://example.com/api/oauth/dialog",\n      "scopes": {\n        "write:pets": "modify pets in your account",\n        "read:pets": "read your pets"\n      }\n    },\n    "authorizationCode": {\n      "authorizationUrl": "https://example.com/api/oauth/dialog",\n      "tokenUrl": "https://example.com/api/oauth/token",\n      "scopes": {\n        "write:pets": "modify pets in your account",\n        "read:pets": "read your pets"\n      }\n    }\n  }\n}\n```\n\n\n\\\nYAML\n```yaml\ntype: oauth2\nflows: \n  implicit:\n    authorizationUrl: https://example.com/api/oauth/dialog\n    scopes:\n      write:pets: modify pets in your account\n      read:pets: read your pets\n  authorizationCode:\n    authorizationUrl: https://example.com/api/oauth/dialog\n    tokenUrl: https://example.com/api/oauth/token\n    scopes:\n      write:pets: modify pets in your account\n      read:pets: read your pets\n```\n',
     targetSpecs: [{ namespace: 'openapi', version: '3.1.0' }],
diff --git a/packages/apidom-ls/src/config/openapi/oauth-flow/lint/allowed-fields.ts b/packages/apidom-ls/src/config/openapi/oauth-flow/lint/allowed-fields.ts
new file mode 100644
index 0000000000..2c6c2fe290
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/oauth-flow/lint/allowed-fields.ts
@@ -0,0 +1,14 @@
+import ApilintCodes from '../../../codes';
+import { LinterMeta } from '../../../../apidom-language-types';
+
+const allowedFieldsLint: LinterMeta = {
+  code: ApilintCodes.NOT_ALLOWED_FIELDS,
+  source: 'apilint',
+  message: 'Object includes not allowed fields',
+  severity: 1,
+  linterFunction: 'allowedFields',
+  linterParams: [['authorizationUrl', 'tokenUrl', 'refreshUrl', 'scopes'], 'x-'],
+  marker: 'key',
+};
+
+export default allowedFieldsLint;
diff --git a/packages/apidom-ls/src/config/openapi/oauth-flow/lint/authorization-url--format-uri.ts b/packages/apidom-ls/src/config/openapi/oauth-flow/lint/authorization-url--format-uri.ts
new file mode 100644
index 0000000000..c50edcbe60
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/oauth-flow/lint/authorization-url--format-uri.ts
@@ -0,0 +1,15 @@
+import ApilintCodes from '../../../codes';
+import { LinterMeta } from '../../../../apidom-language-types';
+
+const authorizationUrlFormatURILint: LinterMeta = {
+  code: ApilintCodes.OPENAPI3_0_OAUTH_FLOW_FIELD_AUTHORIZATION_URL_FORMAT_URI,
+  source: 'apilint',
+  message: "'authorizationUrl' value must be a valid URL",
+  severity: 1,
+  linterFunction: 'apilintValidURI',
+  marker: 'value',
+  target: 'authorizationUrl',
+  data: {},
+};
+
+export default authorizationUrlFormatURILint;
diff --git a/packages/apidom-ls/src/config/openapi/oauth-flow/lint/authorization-url--required.ts b/packages/apidom-ls/src/config/openapi/oauth-flow/lint/authorization-url--required.ts
new file mode 100644
index 0000000000..526b6fdf8b
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/oauth-flow/lint/authorization-url--required.ts
@@ -0,0 +1,24 @@
+import ApilintCodes from '../../../codes';
+import { LinterMeta } from '../../../../apidom-language-types';
+
+const authorizationUrlRequiredLint: LinterMeta = {
+  code: ApilintCodes.OPENAPI3_0_OAUTH_FLOW_FIELD_AUTHORIZATION_URL_REQUIRED,
+  source: 'apilint',
+  message: "should always have a 'authorizationUrl'",
+  severity: 1,
+  linterFunction: 'hasRequiredField',
+  linterParams: ['authorizationUrl'],
+  marker: 'key',
+  data: {
+    quickFix: [
+      {
+        message: "add 'authorizationUrl' field",
+        action: 'addChild',
+        snippetYaml: 'authorizationUrl: \n  ',
+        snippetJson: '"authorizationUrl": "",\n    ',
+      },
+    ],
+  },
+};
+
+export default authorizationUrlRequiredLint;
diff --git a/packages/apidom-ls/src/config/openapi/oauth-flow/lint/index.ts b/packages/apidom-ls/src/config/openapi/oauth-flow/lint/index.ts
new file mode 100644
index 0000000000..e7ef22a219
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/oauth-flow/lint/index.ts
@@ -0,0 +1,21 @@
+import authorizationUrlFormatURILint from './authorization-url--format-uri';
+import authorizationUrlRequiredLint from './authorization-url--required';
+import tokenUrlFormatURILint from './token-url--format-uri';
+import tokenUrlRequiredLint from './token-url--required';
+import refreshUrlFormatURILint from './refresh-url--format-uri';
+import scopesTypeLint from './scopes--type';
+import scopesRequiredLint from './scopes--required';
+import allowedFieldsLint from './allowed-fields';
+
+const lints = [
+  authorizationUrlFormatURILint,
+  authorizationUrlRequiredLint,
+  tokenUrlFormatURILint,
+  tokenUrlRequiredLint,
+  refreshUrlFormatURILint,
+  scopesTypeLint,
+  scopesRequiredLint,
+  allowedFieldsLint,
+];
+
+export default lints;
diff --git a/packages/apidom-ls/src/config/openapi/oauth-flow/lint/refresh-url--format-uri.ts b/packages/apidom-ls/src/config/openapi/oauth-flow/lint/refresh-url--format-uri.ts
new file mode 100644
index 0000000000..f4a1c23049
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/oauth-flow/lint/refresh-url--format-uri.ts
@@ -0,0 +1,15 @@
+import ApilintCodes from '../../../codes';
+import { LinterMeta } from '../../../../apidom-language-types';
+
+const refreshUrlFormatURILint: LinterMeta = {
+  code: ApilintCodes.OPENAPI3_0_OAUTH_FLOW_FIELD_REFRESH_URL_FORMAT_URI,
+  source: 'apilint',
+  message: "'refreshUrl' value must be a valid URL",
+  severity: 1,
+  linterFunction: 'apilintValidURI',
+  marker: 'value',
+  target: 'refreshUrl',
+  data: {},
+};
+
+export default refreshUrlFormatURILint;
diff --git a/packages/apidom-ls/src/config/openapi/oauth-flow/lint/scopes--required.ts b/packages/apidom-ls/src/config/openapi/oauth-flow/lint/scopes--required.ts
new file mode 100644
index 0000000000..b198c48b6e
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/oauth-flow/lint/scopes--required.ts
@@ -0,0 +1,24 @@
+import ApilintCodes from '../../../codes';
+import { LinterMeta } from '../../../../apidom-language-types';
+
+const scopesRequiredLint: LinterMeta = {
+  code: ApilintCodes.OPENAPI3_0_OAUTH_FLOW_FIELD_SCOPES_REQUIRED,
+  source: 'apilint',
+  message: "should always have a 'scopes'",
+  severity: 1,
+  linterFunction: 'hasRequiredField',
+  linterParams: ['scopes'],
+  marker: 'key',
+  data: {
+    quickFix: [
+      {
+        message: "add 'scopes' field",
+        action: 'addChild',
+        snippetYaml: 'scopes: \n  ',
+        snippetJson: '"scopes": {},\n    ',
+      },
+    ],
+  },
+};
+
+export default scopesRequiredLint;
diff --git a/packages/apidom-ls/src/config/openapi/oauth-flow/lint/scopes--type.ts b/packages/apidom-ls/src/config/openapi/oauth-flow/lint/scopes--type.ts
new file mode 100644
index 0000000000..77d1b21bed
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/oauth-flow/lint/scopes--type.ts
@@ -0,0 +1,16 @@
+import ApilintCodes from '../../../codes';
+import { LinterMeta } from '../../../../apidom-language-types';
+
+const scopesTypeLint: LinterMeta = {
+  code: ApilintCodes.OPENAPI3_0_OAUTH_FLOW_FIELD_SCOPES_TYPE,
+  source: 'apilint',
+  message: "'scopes' must be an object",
+  severity: 1,
+  linterFunction: 'apilintElementOrClass',
+  linterParams: ['oauth-flow-scopes'],
+  marker: 'value',
+  target: 'scopes',
+  data: {},
+};
+
+export default scopesTypeLint;
diff --git a/packages/apidom-ls/src/config/openapi/oauth-flow/lint/token-url--format-uri.ts b/packages/apidom-ls/src/config/openapi/oauth-flow/lint/token-url--format-uri.ts
new file mode 100644
index 0000000000..e631621ccf
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/oauth-flow/lint/token-url--format-uri.ts
@@ -0,0 +1,15 @@
+import ApilintCodes from '../../../codes';
+import { LinterMeta } from '../../../../apidom-language-types';
+
+const tokenUrlFormatURILint: LinterMeta = {
+  code: ApilintCodes.OPENAPI3_0_OAUTH_FLOW_FIELD_TOKEN_URL_FORMAT_URI,
+  source: 'apilint',
+  message: "'tokenUrl' value must be a valid URL",
+  severity: 1,
+  linterFunction: 'apilintValidURI',
+  marker: 'value',
+  target: 'tokenUrl',
+  data: {},
+};
+
+export default tokenUrlFormatURILint;
diff --git a/packages/apidom-ls/src/config/openapi/oauth-flow/lint/token-url--required.ts b/packages/apidom-ls/src/config/openapi/oauth-flow/lint/token-url--required.ts
new file mode 100644
index 0000000000..d9191f457b
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/oauth-flow/lint/token-url--required.ts
@@ -0,0 +1,24 @@
+import ApilintCodes from '../../../codes';
+import { LinterMeta } from '../../../../apidom-language-types';
+
+const tokenUrlRequiredLint: LinterMeta = {
+  code: ApilintCodes.OPENAPI3_0_OAUTH_FLOW_FIELD_TOKEN_URL_REQUIRED,
+  source: 'apilint',
+  message: "should always have a 'tokenUrl'",
+  severity: 1,
+  linterFunction: 'hasRequiredField',
+  linterParams: ['tokenUrl'],
+  marker: 'key',
+  data: {
+    quickFix: [
+      {
+        message: "add 'tokenUrl' field",
+        action: 'addChild',
+        snippetYaml: 'tokenUrl: \n  ',
+        snippetJson: '"tokenUrl": "",\n    ',
+      },
+    ],
+  },
+};
+
+export default tokenUrlRequiredLint;
diff --git a/packages/apidom-ls/src/config/openapi/oauth-flow/meta.ts b/packages/apidom-ls/src/config/openapi/oauth-flow/meta.ts
index 33a6f79694..381bda653d 100644
--- a/packages/apidom-ls/src/config/openapi/oauth-flow/meta.ts
+++ b/packages/apidom-ls/src/config/openapi/oauth-flow/meta.ts
@@ -1,7 +1,11 @@
+import lint from './lint';
+import completion from './completion';
 import documentation from './documentation';
 import { FormatMeta } from '../../../apidom-language-types';
 
 const meta: FormatMeta = {
+  lint,
+  completion,
   documentation,
 };
 
diff --git a/packages/apidom-ls/src/config/openapi/operation/lint/deprecated--type.ts b/packages/apidom-ls/src/config/openapi/operation/lint/deprecated--type.ts
index 70914db155..9184b2d6e4 100644
--- a/packages/apidom-ls/src/config/openapi/operation/lint/deprecated--type.ts
+++ b/packages/apidom-ls/src/config/openapi/operation/lint/deprecated--type.ts
@@ -4,7 +4,7 @@ import { LinterMeta } from '../../../../apidom-language-types';
 const deprecatedTypeLint: LinterMeta = {
   code: ApilintCodes.OPENAPI3_0_OPERATION_FIELD_DEPRECATED_TYPE,
   source: 'apilint',
-  message: 'deprecated must be a string',
+  message: 'deprecated must be a boolean',
   severity: 1,
   linterFunction: 'apilintType',
   linterParams: ['boolean'],
diff --git a/packages/apidom-ls/src/config/openapi/xml/completion.ts b/packages/apidom-ls/src/config/openapi/xml/completion.ts
new file mode 100644
index 0000000000..c5b22ec136
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/xml/completion.ts
@@ -0,0 +1,80 @@
+import {
+  ApidomCompletionItem,
+  CompletionFormat,
+  CompletionType,
+} from '../../../apidom-language-types';
+
+const completion: ApidomCompletionItem[] = [
+  {
+    label: 'name',
+    insertText: 'name',
+    kind: 14,
+    format: CompletionFormat.QUOTED,
+    type: CompletionType.PROPERTY,
+    insertTextFormat: 2,
+    documentation: {
+      kind: 'markdown',
+      value:
+        'Replaces the name of the element/attribute used for the described schema property. When defined within `items`, it will affect the name of the individual XML elements within the list. When defined alongside `type` being `array` (outside the `items`), it will affect the wrapping element and only if `wrapped` is `true`. If `wrapped` is `false`, it will be ignored.',
+    },
+  },
+  {
+    label: 'namespace',
+    insertText: 'namespace',
+    kind: 14,
+    format: CompletionFormat.QUOTED,
+    type: CompletionType.PROPERTY,
+    insertTextFormat: 2,
+    documentation: {
+      kind: 'markdown',
+      value: 'The URI of the namespace definition. This MUST be in the form of an absolute URI.',
+    },
+  },
+  {
+    label: 'prefix',
+    insertText: 'prefix ',
+    kind: 14,
+    format: CompletionFormat.QUOTED,
+    type: CompletionType.PROPERTY,
+    insertTextFormat: 2,
+    documentation: {
+      kind: 'markdown',
+      value:
+        'The prefix to be used for the [name](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.0.3.md#xmlName).',
+    },
+    targetSpecs: [
+      { namespace: 'openapi', version: '3.0.0' },
+      { namespace: 'openapi', version: '3.0.1' },
+      { namespace: 'openapi', version: '3.0.2' },
+      { namespace: 'openapi', version: '3.0.3' },
+    ],
+  },
+  {
+    label: 'attribute',
+    insertText: 'attribute ',
+    kind: 14,
+    format: CompletionFormat.UNQUOTED,
+    type: CompletionType.PROPERTY,
+    insertTextFormat: 2,
+    documentation: {
+      kind: 'markdown',
+      value:
+        'Declares whether the property definition translates to an attribute instead of an element. Default value is `false`.',
+    },
+  },
+  {
+    label: 'wrapped',
+    insertText: 'wrapped ',
+    kind: 14,
+    format: CompletionFormat.UNQUOTED,
+    type: CompletionType.PROPERTY,
+    insertTextFormat: 2,
+    documentation: {
+      kind: 'markdown',
+      value:
+        'MAY be used only for an array definition. Signifies whether the array is wrapped (for example, `<books><book/><book/></books>`) or unwrapped (`<book/><book/>`). Default value is `false`. The definition takes effect only when defined alongside `type` being `array` (outside the `items`).',
+    },
+  },
+];
+
+export default completion;
diff --git a/packages/apidom-ls/src/config/openapi/xml/documentation.ts b/packages/apidom-ls/src/config/openapi/xml/documentation.ts
index ceb90f02cd..e32a7d3cf6 100644
--- a/packages/apidom-ls/src/config/openapi/xml/documentation.ts
+++ b/packages/apidom-ls/src/config/openapi/xml/documentation.ts
@@ -7,6 +7,16 @@ const documentation = [
     target: 'namespace',
     docs: 'The URI of the namespace definition. This MUST be in the form of an absolute URI.',
   },
+  {
+    target: 'prefix',
+    docs: 'The prefix to be used for the [name](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.0.3.md#xmlName).',
+    targetSpecs: [
+      { namespace: 'openapi', version: '3.0.0' },
+      { namespace: 'openapi', version: '3.0.1' },
+      { namespace: 'openapi', version: '3.0.2' },
+      { namespace: 'openapi', version: '3.0.3' },
+    ],
+  },
   {
     target: 'prefix',
     docs: 'The prefix to be used for the [name](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#xmlName).',
@@ -20,13 +30,22 @@ const documentation = [
     target: 'wrapped',
     docs: 'MAY be used only for an array definition. Signifies whether the array is wrapped (for example, `<books><book/><book/></books>`) or unwrapped (`<book/><book/>`). Default value is `false`. The definition takes effect only when defined alongside `type` being `array` (outside the `items`).',
   },
+  /**
+   * The original documentation has been trimmed in this implementation for readability purposes
+   * A new custom section `Additional documentation topics` has been added,
+   * which adds external links back to the original documentation
+   */
+  {
+    docs: '#### [XML Object](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.0.3.md#xmlObject)\n\nA metadata object that allows for more fine-tuned XML model definitions.\n\nWhen using arrays, XML element names are *not* inferred (for singular/plural forms) and the `name` property SHOULD be used to add that information.\nSee examples for expected behavior.\n\n##### Fixed Fields\nField Name | Type | Description\n---|:---:|---\nname | `string` | Replaces the name of the element/attribute used for the described schema property. When defined within `items`, it will affect the name of the individual XML elements within the list. When defined alongside `type` being `array` (outside the `items`), it will affect the wrapping element and only if `wrapped` is `true`. If `wrapped` is `false`, it will be ignored.\nnamespace | `string` | The URI of the namespace definition. Value MUST be in the form of an absolute URI.\nprefix | `string` | The prefix to be used for the [name](#xmlName).\nattribute | `boolean` | Declares whether the property definition translates to an attribute instead of an element. Default value is `false`.\nwrapped | `boolean` | MAY be used only for an array definition. Signifies whether the array is wrapped (for example, `<books><book/><book/></books>`) or unwrapped (`<book/><book/>`). Default value is `false`. The definition takes effect only when defined alongside `type` being `array` (outside the `items`).\n\nThis object MAY be extended with [Specification Extensions](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.0.3.md#specificationExtensions).\n\n#### Additional documentation topics\n\n##### [XML Object Examples](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.0.3.md#xml-object-examples)\nThe examples of the XML object definitions are included inside a property definition of a [Schema Object](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.0.3.md#schemaObject) with a sample of the XML representation of it.\n\n- [No XML Element](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.0.3.md#no-xml-element)\n- [XML Name Replacement](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.0.3.md#xml-name-replacement)\n- [XML Attribute, Prefix and Namespace](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.0.3.md#xml-attribute-prefix-and-namespace)\n- [XML Arrays](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.0.3.md#xml-arrays)',
+    targetSpecs: [
+      { namespace: 'openapi', version: '3.0.0' },
+      { namespace: 'openapi', version: '3.0.1' },
+      { namespace: 'openapi', version: '3.0.2' },
+      { namespace: 'openapi', version: '3.0.3' },
+    ],
+  },
   {
-    /**
-     * The original documentation has been trimmed in this implementation for readability purposes
-     * A new custom section `Additional documentation topics` has been added,
-     * which adds external links back to the original documentation
-     */
-    docs: '#### [XML Object](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#xmlObject)\n\nA metadata object that allows for more fine-tuned XML model definitions.\n\nWhen using arrays, XML element names are *not* inferred (for singular/plural forms) and the `name` property SHOULD be used to add that information.\nSee examples for expected behavior.\n\n##### Fixed Fields\nField Name | Type | Description\n---|:---:|---\nname | `string` | Replaces the name of the element/attribute used for the described schema property. When defined within `items`, it will affect the name of the individual XML elements within the list. When defined alongside `type` being `array` (outside the `items`), it will affect the wrapping element and only if `wrapped` is `true`. If `wrapped` is `false`, it will be ignored.\nnamespace | `string` | The URI of the namespace definition. This MUST be in the form of an absolute URI.\nprefix | `string` | The prefix to be used for the [name](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#xmlName).\nattribute | `boolean` | Declares whether the property definition translates to an attribute instead of an element. Default value is `false`.\nwrapped | `boolean` | MAY be used only for an array definition. Signifies whether the array is wrapped (for example, `<books><book/><book/></books>`) or unwrapped (`<book/><book/>`). Default value is `false`. The definition takes effect only when defined alongside `type` being `array` (outside the `items`).\n\nThis object MAY be extended with [Specification Extensions](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#specificationExtensions).\n\n\\\n#### Additional documentation topics\n\n##### [XML Object Examples](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#xml-object-examples)\nThe examples of the XML object definitions are included inside a property definition of a [Schema Object](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#schemaObject) with a sample of the XML representation of it.\n\n- [No XML Element](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#no-xml-element)\n- [XML Name Replacement](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#xml-name-replacement)\n- [XML Attribute, Prefix and Namespace](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#xml-attribute-prefix-and-namespace)\n- [XML Arrays](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#xml-arrays)\n',
+    docs: '#### [XML Object](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#xmlObject)\n\nA metadata object that allows for more fine-tuned XML model definitions.\n\nWhen using arrays, XML element names are *not* inferred (for singular/plural forms) and the `name` property SHOULD be used to add that information.\nSee examples for expected behavior.\n\n##### Fixed Fields\nField Name | Type | Description\n---|:---:|---\nname | `string` | Replaces the name of the element/attribute used for the described schema property. When defined within `items`, it will affect the name of the individual XML elements within the list. When defined alongside `type` being `array` (outside the `items`), it will affect the wrapping element and only if `wrapped` is `true`. If `wrapped` is `false`, it will be ignored.\nnamespace | `string` | The URI of the namespace definition. This MUST be in the form of an absolute URI.\nprefix | `string` | The prefix to be used for the [name](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#xmlName).\nattribute | `boolean` | Declares whether the property definition translates to an attribute instead of an element. Default value is `false`.\nwrapped | `boolean` | MAY be used only for an array definition. Signifies whether the array is wrapped (for example, `<books><book/><book/></books>`) or unwrapped (`<book/><book/>`). Default value is `false`. The definition takes effect only when defined alongside `type` being `array` (outside the `items`).\n\nThis object MAY be extended with [Specification Extensions](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#specificationExtensions).\n\n#### Additional documentation topics\n\n##### [XML Object Examples](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#xml-object-examples)\nThe examples of the XML object definitions are included inside a property definition of a [Schema Object](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#schemaObject) with a sample of the XML representation of it.\n\n- [No XML Element](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#no-xml-element)\n- [XML Name Replacement](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#xml-name-replacement)\n- [XML Attribute, Prefix and Namespace](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#xml-attribute-prefix-and-namespace)\n- [XML Arrays](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#xml-arrays)\n',
     targetSpecs: [{ namespace: 'openapi', version: '3.1.0' }],
   },
 ];
diff --git a/packages/apidom-ls/src/config/openapi/xml/lint/allowed-fields.ts b/packages/apidom-ls/src/config/openapi/xml/lint/allowed-fields.ts
new file mode 100644
index 0000000000..59b0537a47
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/xml/lint/allowed-fields.ts
@@ -0,0 +1,14 @@
+import ApilintCodes from '../../../codes';
+import { LinterMeta } from '../../../../apidom-language-types';
+
+const allowedFieldsLint: LinterMeta = {
+  code: ApilintCodes.NOT_ALLOWED_FIELDS,
+  source: 'apilint',
+  message: 'Object includes not allowed fields',
+  severity: 1,
+  linterFunction: 'allowedFields',
+  linterParams: [['name', 'namespace', 'prefix', 'attribute', 'wrapped'], 'x-'],
+  marker: 'key',
+};
+
+export default allowedFieldsLint;
diff --git a/packages/apidom-ls/src/config/openapi/xml/lint/attribute--type.ts b/packages/apidom-ls/src/config/openapi/xml/lint/attribute--type.ts
new file mode 100644
index 0000000000..da2210351d
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/xml/lint/attribute--type.ts
@@ -0,0 +1,16 @@
+import ApilintCodes from '../../../codes';
+import { LinterMeta } from '../../../../apidom-language-types';
+
+const attributeTypeLint: LinterMeta = {
+  code: ApilintCodes.OPENAPI3_0_XML_FIELD_ATTRIBUTE_TYPE,
+  source: 'apilint',
+  message: 'attribute must be a boolean',
+  severity: 1,
+  linterFunction: 'apilintType',
+  linterParams: ['boolean'],
+  marker: 'value',
+  target: 'attribute',
+  data: {},
+};
+
+export default attributeTypeLint;
diff --git a/packages/apidom-ls/src/config/openapi/xml/lint/index.ts b/packages/apidom-ls/src/config/openapi/xml/lint/index.ts
new file mode 100644
index 0000000000..9df0137bb3
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/xml/lint/index.ts
@@ -0,0 +1,17 @@
+import allowedFieldsLint from './allowed-fields';
+import nameTypeLint from './name--type';
+import namespaceFormatURILint from './namespace--format-uri';
+import prefixTypeLint from './prefix--type';
+import attributeTypeLint from './attribute--type';
+import wrappedTypeLint from './wrapped--type';
+
+const lints = [
+  nameTypeLint,
+  namespaceFormatURILint,
+  prefixTypeLint,
+  attributeTypeLint,
+  wrappedTypeLint,
+  allowedFieldsLint,
+];
+
+export default lints;
diff --git a/packages/apidom-ls/src/config/openapi/xml/lint/name--type.ts b/packages/apidom-ls/src/config/openapi/xml/lint/name--type.ts
new file mode 100644
index 0000000000..0d0012b9c1
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/xml/lint/name--type.ts
@@ -0,0 +1,16 @@
+import ApilintCodes from '../../../codes';
+import { LinterMeta } from '../../../../apidom-language-types';
+
+const nameTypeLint: LinterMeta = {
+  code: ApilintCodes.OPENAPI3_0_XML_FIELD_NAME_TYPE,
+  source: 'apilint',
+  message: 'name must be a string',
+  severity: 1,
+  linterFunction: 'apilintType',
+  linterParams: ['string'],
+  marker: 'value',
+  target: 'name',
+  data: {},
+};
+
+export default nameTypeLint;
diff --git a/packages/apidom-ls/src/config/openapi/xml/lint/namespace--format-uri.ts b/packages/apidom-ls/src/config/openapi/xml/lint/namespace--format-uri.ts
new file mode 100644
index 0000000000..3e3c8a5185
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/xml/lint/namespace--format-uri.ts
@@ -0,0 +1,16 @@
+import ApilintCodes from '../../../codes';
+import { LinterMeta } from '../../../../apidom-language-types';
+
+const namespaceFormatURILint: LinterMeta = {
+  code: ApilintCodes.OPENAPI3_0_XML_FIELD_NAMESPACE_FORMAT_URI,
+  source: 'apilint',
+  message: 'namespace MUST be in the format of an absolute URL.',
+  severity: 1,
+  linterFunction: 'apilintValidURI',
+  linterParams: [true],
+  marker: 'value',
+  target: 'namespace',
+  data: {},
+};
+
+export default namespaceFormatURILint;
diff --git a/packages/apidom-ls/src/config/openapi/xml/lint/prefix--type.ts b/packages/apidom-ls/src/config/openapi/xml/lint/prefix--type.ts
new file mode 100644
index 0000000000..a4859bd286
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/xml/lint/prefix--type.ts
@@ -0,0 +1,16 @@
+import ApilintCodes from '../../../codes';
+import { LinterMeta } from '../../../../apidom-language-types';
+
+const prefixTypeLint: LinterMeta = {
+  code: ApilintCodes.OPENAPI3_0_XML_FIELD_PREFIX_TYPE,
+  source: 'apilint',
+  message: 'prefix must be a string',
+  severity: 1,
+  linterFunction: 'apilintType',
+  linterParams: ['string'],
+  marker: 'value',
+  target: 'prefix',
+  data: {},
+};
+
+export default prefixTypeLint;
diff --git a/packages/apidom-ls/src/config/openapi/xml/lint/wrapped--type.ts b/packages/apidom-ls/src/config/openapi/xml/lint/wrapped--type.ts
new file mode 100644
index 0000000000..22bb385840
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/xml/lint/wrapped--type.ts
@@ -0,0 +1,16 @@
+import ApilintCodes from '../../../codes';
+import { LinterMeta } from '../../../../apidom-language-types';
+
+const wrappedTypeLint: LinterMeta = {
+  code: ApilintCodes.OPENAPI3_0_XML_FIELD_WRAPPED_TYPE,
+  source: 'apilint',
+  message: 'wrapped must be a boolean',
+  severity: 1,
+  linterFunction: 'apilintType',
+  linterParams: ['boolean'],
+  marker: 'value',
+  target: 'wrapped',
+  data: {},
+};
+
+export default wrappedTypeLint;
diff --git a/packages/apidom-ls/src/config/openapi/xml/meta.ts b/packages/apidom-ls/src/config/openapi/xml/meta.ts
index 33a6f79694..381bda653d 100644
--- a/packages/apidom-ls/src/config/openapi/xml/meta.ts
+++ b/packages/apidom-ls/src/config/openapi/xml/meta.ts
@@ -1,7 +1,11 @@
+import lint from './lint';
+import completion from './completion';
 import documentation from './documentation';
 import { FormatMeta } from '../../../apidom-language-types';
 
 const meta: FormatMeta = {
+  lint,
+  completion,
   documentation,
 };
 
diff --git a/packages/apidom-ls/src/services/validation/linter-functions.ts b/packages/apidom-ls/src/services/validation/linter-functions.ts
index 5c34021071..6e90a8f994 100644
--- a/packages/apidom-ls/src/services/validation/linter-functions.ts
+++ b/packages/apidom-ls/src/services/validation/linter-functions.ts
@@ -494,14 +494,14 @@ export const standardLinterfunctions: FunctionItem[] = [
   },
   {
     functionName: 'apilintValidURI',
-    function: (element: Element): boolean => {
+    function: (element: Element, absolute = false): boolean => {
       if (element) {
         if (!isString(element)) {
           return false;
         }
         try {
           // eslint-disable-next-line no-new
-          new URL(element.toValue(), 'http://example.com');
+          new URL(element.toValue(), absolute ? undefined : 'http://example.com');
         } catch (e) {
           return false;
         }